ISRO EC 2023 Q.93: solution and answer

ISRO 2023 · ECQ.93 · 1 mark · MCQ

Directions: The graph given below represents the variations in earnings in rupees over a week. Study the graph and answer questions given below. The difference in earnings was large between

ISRO EC 2023 question 93: Line chart titled 'Earnings per day'. — Figure from the ISRO EC 2023 paper. It is part of the question.

(A)
Sunday-Monday
(B)
Tuesday-Wednesday
(C)
Thursday-Friday
(D)
None of these

Answer and solution

ANSWER

The difference in earnings was largest between Sunday and Monday (400), so the answer is (a).

Official answer: ASource: ISRO's revised and final answer key of 16 February 2024

Read the earnings from the graph: Sunday 100, Monday 500, Tuesday 300, Wednesday 600, Thursday 650, Friday 300, Saturday 350.
Sunday-Monday: $∣500 - 100∣ = 400$ .
Tuesday-Wednesday: $∣600 - 300∣ = 300$ .
Thursday-Friday: $∣650 - 300∣ = 350$ .
The largest of the three differences is $400$ , between Sunday and Monday. This is option (a). Since one of the listed pairs has the largest difference, (d) is not correct.

KEY IDEA

Read each point off the line graph, take the absolute difference for each pair of consecutive days given, and compare. A steep segment of the line marks a large change.

WATCH OUT FOR

Judging by the highest points (Wednesday, Thursday) instead of the change between two days, or misreading the Thursday value of 650 and thinking Thursday-Friday is the steepest fall.

From the ISRO EC 2023 paper. Also Q.93 of the ISRO Scientist/Engineer Computer Science 2023 paper. Every question of this paper · The full paper (PDF, ISRO) · All 2 ISRO Data interpretation questions, with notes